MR-only

MR-only workflow for radiotherapy refers to utilizing magnetic resonance imaging (MRI) as the sole imaging modality for the treatment planning in radiation therapy.

Traditionally, computed tomography (CT) has been the primary imaging modality used in radiotherapy for treatment planning due to its availability, speed, and ability to provide electron density information for dose calculation. However, MR imaging offers several advantages over CT, such as improved spatial accuracy, cost savings and reduced radiation dose*.

Gold Anchor MR+ is ideal for use with MR-only workflow with its unique marker material for enhanced MRI-visibility.

Download the white paper from Tampere University Hospital to learn more about how Gold Anchor can be used for MR-only workflow for prostate SBRT.

*Jonsson J, Nyholm T, Soderkvist K. The rationale for MR-only treatment planning for external radiotherapy. Clin Transl Radiat Oncol 2019;18:60 https://doi.org/10.1016/j.ctro.2019.03.005

kv picture breast

MRI T2: Visibility of one ball-shaped 0.28×10 mm Gold Anchor MR+ in T2 2D

Gold Anchor marker with balanced fast field echo

Line shaped 0.4×10 mm Gold Anchor marker with 0.5% iron can be visualized with Balanced Fast Field Echo (bFFE) MR sequences. Image courtesy of the Department of Oncology and Radiotherapy, Turku University Hospital.

The Department of Oncology and Radiotherapy at Turku University Hospital in Finland is using the 0.4×10 mm Gold Anchor marker with 0.5% iron implanted with a line shape in prostate (two markers per patient).

They have a 1.5 T Philips Ingenia MR-RT system and use a Balanced Fast Field Echo (bFFE) sequence with the following specifications to visualize the Gold Anchor markers:

  • Voxel size is 1*1*3 mm, 3mm is the head-feet resolution.
  • TE 4.6 ms and TR 194 ms
  • MRI has been taken with flat tabletop and anterior RT-coil system.

Here is a link presenting their MR-only workflow for prostate patients.

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